Write smart contracts in JavaScript. Finally.
No Solidity. No Rust. No Move. Just JavaScript — ES modules, classes, and patterns you already know. Asentum's V8 Isolate engine executes contracts in a deterministic sandbox with gas metering, state persistence, and a rich standard library. Deploy from the browser or CLI in minutes.
Familiar patterns, blockchain superpowers
Contracts are ES modules that export a default class. State is class properties (auto-persisted). Use msg.sender, block.timestamp, emit(), and assert() — injected globals that connect your JavaScript to the chain.
V8 Isolate Sandbox
Each contract runs in an isolated V8 context with no access to filesystem, network, or system APIs. Deterministic execution with seeded PRNG, block timestamps replacing Date, and BigInt for safe math.
Gas Metering
Precise instruction-level gas counting via V8 engine. EIP-1559 pricing with dynamic base fee and priority tips. Simple transfers cost ~$0.001. 5-second hard timeout prevents infinite loops.
Standard Library
Built-in @asentum/token (ERC20-like), @asentum/nft, @asentum/dao, @asentum/math (BigInt wrappers), and @asentum/storage. Import standards like npm packages — no reinventing the wheel.
Browser Playground
Monaco editor in the browser. Write contracts, deploy to testnet with one click. Built-in debugger, state inspector, template gallery, and AI assistant. Zero local setup required.
Start with a template, ship in minutes
Our template gallery includes production-ready contracts you can customize and deploy. Tokens, NFTs, DAOs, DEXs, staking pools, lending protocols — all written in clean JavaScript with full documentation.
Token (ERC20)
Fungible tokens with mint, burn, transfer, and allowance. Built on @asentum/token standard.
NFT Collection
Non-fungible tokens with metadata, royalties, and marketplace integration. Built on @asentum/nft.
DAO Governance
Proposal creation, voting, execution, and treasury management. Built on @asentum/dao.
AMM DEX
Automated market maker with liquidity pools, swaps, and fee distribution.
Staking Pool
Pooled staking contract with reward distribution, delegation, and withdrawal.
Lending Protocol
Collateralized lending with interest rates, liquidation, and health factors.
